The NEVA 3208 geyser is convenient, simple and reliable. Despite the venerable age of most of the units in use, they cope with their duties of heating water quite well. But sometimes you want to clarify something in the instruction manual. And this is where the problem arises.

The original instructions are most often lost, and downloading the operating instructions on the Internet is Neva-3208 impossible. More modern columns Neva series 4000, 5000, Neva Lux 6000, boilers Neva Lux series 8000 - please, but there are no instructions for Neva 3208.

The search only turns up fraudulent sites that require a number cell phone, but even there there are no instructions - just the name of the file. This can be easily checked by trying to find on such a site a file with a obviously non-existent name - for example, “ qwerrasdfgfgh-$%#$@$" He will find it, and even say that it has been downloaded several thousand times! I hope that you don’t fall for such tricks and don’t enter your phone number on suspicious sites. You can find the operating instructions for the Neva-3208 gas water heater here.

HOUSEHOLD FLOW-FLOW GAS WATER HEATING APPARATUS

NEVA-3208 GOST 19910-94

NEVA-3208-02 GOST 19910-94

OPERATION MANUAL 3208-00.000-02 RE

Dear buyer!

When purchasing the device, check the contents and presentation device, and also require the sales organization to fill out coupons for warranty repairs

Before installing and operating the device, you must carefully read the rules and requirements set out in this operating manual, compliance with which will ensure long-term trouble-free and safe operation of the water heater.

Violation of installation and operation instructions may lead to an accident or damage the device.

1. GENERAL INSTRUCTIONS

1.1. The household instantaneous gas water heating device "NEVA-3208" (NEVA-3208-02) VPG-18-223-V11-R2 GOST 19910-94, hereinafter referred to as the "apparatus", is intended for heating water used for sanitary purposes (washing dishes , washing, bathing) in apartments, cottages, country houses.

1.2. The device is designed to operate on natural gas in accordance with GOST 5542-87 with a lower calorific value of 35570+/-1780 kJ/m3 (8500+/-425 kcal/m3) or liquefied gas in accordance with GOST 20448-90 with a lower calorific value of 96250+/- 4810 kJ/m3 (23000+/-1150 kcal/m3).

When manufactured at the factory, the device is configured for a specific type of gas, indicated on the plate on the device and in the “Acceptance Certificate” section of this manual.

1.3. Installation, installation, instruction of the owner, preventive maintenance, troubleshooting and repairs are carried out by operating organizations of the gas industry or other organizations licensed to this type activities. Section 13 must contain a mark and stamp of the organization installing the device.

1.4. Checking and cleaning the chimney, repairs and monitoring of the water supply system are carried out by the owner of the device or the house management.

1.5. Responsibility for safe operation the device and its owner is responsible for maintaining it in proper condition.

2. TECHNICAL DATA

2.1. Rated thermal power 23.2 kW

2.2. Nominal heating output 18.0 kW

2.3. Rated thermal power of the pilot burner no more than 0.35 kW

2.4 Nominal pressure natural gas 1274 Pa (130 mm water column)

2.5 Nominal pressure of liquefied gas 2940 Pa (300 mm water column)

2.6. Nominal natural gas consumption 2.35 cubic meters. m/hour.

2.6. Nominal consumption of liquefied gas is 0.87 cubic meters. m/hour.

2.7. Efficiency of at least 80%

2.8. Supply water pressure for normal operation of the device 50…600 kPa

2.9. Water consumption when heating by 40 degrees (at rated power) 6.45 l/min

2.10. The temperature of gas combustion products is not less than 110 degrees

2.11. Vacuum in the chimney is not less than 2.0 Pa (0.2 mm water column), not more than 30.0 Pa (3.0 mm water column)

2.12. Ignition of the “NEVA-3208” apparatus is piezoelectric, of the “NEVA-3208-02” apparatus - with a match

2.13. Dimensions apparatus: height 680 mm, depth 278 mm, width 390 mm

2.14. Device weight no more than 20 kg

3. DELIVERY SET

3208-00.000 Device “Neva-3208”, or “NEVA-3208-02” 1 pc.

3208-00.000-02 RE Operating manual 1 copy.

3208-06.300 Packing 1 pc.

3208-00.001 Handle 1 pc.

Wall mounting elements 1 set

3103-00.014 Gasket 4 pcs.

3204-00.013 Bushing 1 pc.

4. SAFETY INSTRUCTIONS

4.1. The room where the device is installed must be constantly ventilated.

4.2. To avoid fire, do not place flammable substances or materials on the device or hang it near it.

4.3. After stopping the operation of the device, it is necessary to disconnect it from the gas supply.

4.4. To prevent the appliance from defrosting in winter time(when installed in unheated rooms), it is necessary to drain the water from it.

4.5. To avoid accidents and failure of the device, consumers are PROHIBITED from:

a) independently install and put the device into operation;

b) allow children, as well as persons unfamiliar with this operating manual, to use the device;

c) operate the device on gas that does not correspond to that specified on the plate on the device and the “Acceptance Certificate” of this manual;

d) close the grille or gap at the bottom of the door or wall intended for the flow of air necessary for gas combustion;

e) use the device in the absence of draft in the chimney;

f) use a faulty device;

g) independently disassemble and repair the device;

h) make changes to the design of the device;

i) leave a working device unattended.

4.6. At normal operation device and if the gas pipeline is in good working order, there should be no smell of gas in the room.

If you smell gas in the room, you MUST:

a) immediately turn off the device;

b) close the gas valve located on the gas pipeline in front of the device;

c) thoroughly ventilate the room;

d) immediately call the emergency gas service by phone. 04.

Until the gas leak is eliminated, do not perform any work related to spark formation: do not light a fire, do not turn on or off electrical appliances and electric lighting, do not smoke.

4.7. If abnormal operation of the device is detected, you must contact the gas service and do not use the device until the malfunction is eliminated.

4.8. If you use a faulty device or if the above operating rules are not followed, an explosion or poisoning may occur with gas or carbon monoxide (carbon monoxide) contained in the products of incomplete combustion of gas.

The first signs of poisoning are: heaviness in the head, palpitations, tinnitus, dizziness, general weakness, then nausea, vomiting, shortness of breath, and impaired motor functions may appear. A person who is burned may suddenly lose consciousness.

To provide first aid, it is necessary to: take the victim out into the fresh air, unfasten clothing that is restricting breathing, and give him a sniff. ammonia, cover warmly, but do not let you fall asleep and call a doctor.

If there is no breathing, immediately take the victim to a warm room with fresh air and perform artificial respiration without stopping it until the doctor arrives.

5. DEVICE AND OPERATION

5.1. Device structure

5.1.1. The wall-mounted device (Fig. 1) has rectangular shape, formed by removable lining 7.

5.1.2. All main elements of the device are mounted on the frame. On the front side of the cladding there are: handle 2 for controlling the gas tap, button 3 for turning on the solenoid valve, viewing window 8 for observing the flame of the ignition and main burners.

5.1.3. The apparatus (Fig. 2) consists of a combustion chamber 1 (which includes a frame 3, a gas exhaust device 4 and a heat exchanger 2), a water-gas burner unit 5 (consisting of a main burner 6, an ignition burner 7, a gas valve 9, a water regulator 10, a valve electromagnetic 11) and tube 8, designed to turn off the water heater in the absence of draft in the chimney.

NOTE: Due to the fact that OJSC continues to work to further improve the design of the device, the purchased device may not completely coincide in individual elements with the description or image in the “Operation Manual”.

5.2. Description of the device operation

5.2.1. Gas through pipe 4 (Fig. 1) enters solenoid valve 11 (Fig. 2), the activation button 3 (Fig. 1) is located to the right of the gas tap switch handle.

5.2.2. When you press the solenoid valve button and open” (to the “Ignition” position) (Fig. 3), the gas flows to the pilot burner. The thermocouple, heated by the pilot burner flame, transmits the EMF to the valve electromagnet, which automatically holds the valve plate open and provides gas access to the gas valve.

5.2.3. When turning handle 2 (Fig. 1) clockwise, gas valve 9 (Fig. 2) carries out the sequence of turning on the pilot burner to the “Ignition” position (see Fig. 3), supplying gas to the main burner in the “Apparatus on” position ( see Fig. 3) and regulates the amount of gas supplied to the main burner within the “Large flame” - “Small flame” positions (see Fig. 3) to obtain the desired water temperature. In this case, the main burner lights up only when water flows through the device (when the tap is opened hot water).

5.2.4 The device is turned off by turning the control knob counterclockwise until it stops, and the main and ignition burners are instantly extinguished. The valve of the electromagnetic plug will remain open until the thermocouple cools down (10... 15 s).

5.2.5. To ensure smooth ignition of the main burner, the water regulator is equipped with an ignition retarder, which acts as a throttle when water flows out of the above-membrane cavity and slows down the upward movement of the membrane, and therefore the ignition speed of the main burner.

The device is equipped with safety devices that provide:

• gas access to the main burner only in the presence of a pilot flame and water flow
• closing the gas valve to the main burner in cases where the pilot burner goes out or the water flow stops,
• turning off the main and ignition burners in the absence of draft in the chimney.

1 - pipe, 2 - handle; 3 - button: 4 - gas supply pipe; 5 - hot water outlet pipe, 6 - supply pipe cold water; 7 - cladding, 8 - viewing window

Figure 1. Domestic instantaneous gas water heating device

1 - combustion chamber; 2 - heat exchanger; 3 - frame; 4 - gas exhaust device; 5 - water-gas burner block; 6 - main burner; 7 - pilot burner; 8 - draft sensor tube; 9 - gas tap: 10 - water regulator; 11 - solenoid valve; 12 - thermocouple; 13 - piezo ignition (NEVA-3208); 14 - plate.

Figure 2. Domestic instantaneous gas water heating device (without lining)

Figure 3. Gas valve control handle positions

6. INSTALLATION PROCEDURE

6.1. Installation of the device

6.1.1. The device must be installed in kitchens or other non-residential premises in accordance with the Gasification Project and SNiP 2.04.08.87

6.1.2. Installation and assembly of the device must be carried out by the operating organization of the gas industry or other organizations licensed for this type of activity

6.1.3. The device is hung with holes (on the frame) on a special bracket mounted on the wall. The installation holes of the device are shown in Figure 4. It is recommended to install the device so that the viewing window 8 (see Figure 1) is at eye level of the consumer.

6.1.4. Connection dimensions pipelines for gas supply, water supply and removal, combustion products removal through the chimney are shown in Figure 1

6.2. Water and gas connection

6.2.1 Connection should be made with pipes with DN 15 mm. When installing pipelines, it is recommended to first make connections to the water inlet and outlet points, fill the heat exchanger and water system water and only after that make connection to the gas supply point. The connection should not be accompanied by mutual tension of pipes and parts of the apparatus in order to avoid displacement or breakage of individual parts and parts of the apparatus and violation of the tightness of the gas and water systems.

6.2.2. After installing the device, its connections to communications must be checked for leaks. Checking the tightness of the water inlet and outlet connections is carried out by opening the shut-off valve (see Fig. 4) of cold water (with the water taps closed). Leakage at the joints is not allowed.

Check the tightness of the gas supply connection by opening the common tap on the gas pipeline with the handle of the device in the closed position (the “Device is off” position). Check by washing the joints or special devices. Gas leakage is not allowed.

6.3. Installation of a chimney to remove combustion products

The apparatus must be provided with a system for removing combustion products from the apparatus to the outside of the building. Smoke exhaust pipes must meet the following requirements:

• must be sealed and made of fireproof and corrosion-resistant materials, such as: stainless steel, galvanized steel, enameled steel, aluminum, copper with a wall thickness of at least 0.5 mm;
• length connecting pipe should not be more than 3 m, the pipe should not have more than three turns, the slope of the horizontal section of the pipe should be at least 0.01 towards the water heater;
• the height of the vertical part of the pipe (from the water heater to the axis of the horizontal section) must be at least three times the diameter;
• the internal diameter of smoke exhaust pipes must be at least 125 mm.

6.3.3. The connection between the device and the chimney must be sealed. It is recommended to install the pipe according to the diagram in Figure 5.

6.4. After installation, installation and leak testing, the operation of the safety automatics must be checked (clauses 5.2.5 and 5.2.6.).

Figure 4. Device installation diagram

1 - smoke exhaust pipe; 2 - pipe; 3 - heat-resistant seal

Figure 5. Connection diagram for the smoke exhaust pipe

7. OPERATION PROCEDURE

7.1. Turning on the device

7.1.1. To turn on the device it is necessary (see Fig. 4)

a) open the common valve on the gas pipeline in front of the device;

b) open the cold water shut-off valve (in front of the device);

c) set the handle of the device to the “Ignition” position (see Fig. 3),

d) press the solenoid valve button 3 (see Fig. 1) and repeatedly press the piezo ignition button 13 (see Fig. 2) (or bring a lit match to the pilot burner) until a flame appears on the pilot burner;

e) release the solenoid valve button after turning it on (after no more than 60 s), while the pilot burner flame should not go out.

WARNING: To avoid burns, do not place your eyes too close to the viewing window.

When first igniting or after a long period of non-use of the device, in order to remove air from gas communications, repeat the specified operations in items d and e.

f) open the gas tap to the main burner, to do this, turn the gas tap handle to the right until it stops (the “Big Flame” position). In this case, the pilot burner continues to burn, but the main burner has not yet ignited.

g) open the water tap, and the main burner should ignite. The degree of water heating is adjusted by turning the handle of the device within the “Large Flame” - “Small Flame” positions or by changing the flow rate of water passing through the device.

7.2. Turning off the device

7.2.1. At the end of use, you must turn off the device, observing the following sequence:

a) close the water taps (see Fig. 4);

b) turn knob 2 (see Fig. 1) to the “Device off” position (counterclockwise until it stops);

c) close the common valve on the gas pipeline;

d) close the cold water shut-off valve.

8. MAINTENANCE

8.1. To ensure long-term trouble-free operation and maintain the performance of the device, it is necessary to regularly carry out care, inspection and maintenance. Maintenance and inspection are carried out by the owner of the device.

Maintenance is carried out at least once a year by gas service specialists or other organizations licensed for this type of activity.

8.2.1. The device should be kept clean by regularly removing dust from the top surface of the device, and also wiping the lining first with a damp and then a dry cloth. In case of significant contamination, first wipe the lining with a wet cloth moistened with a neutral detergent, and then with a dry cloth.

8.2.2. It is prohibited to use detergents enhanced action and containing abrasive particles, gasoline or other organic solvents for cleaning cladding surfaces and plastic parts.

8.3. Inspection

Before each time you turn on the device, you must:

a) check that there are no combustible objects near the device;

b) check for gas leaks (by characteristic odor) and water leaks (visually);

c) check the serviceability of the burners according to the combustion pattern:

the pilot burner flame must be elongated, not smoking, and reach the main burner (deflection of the flame sharply upward indicates clogging of the air supply channels to the burner);

the flame of the main burner should be blue, smooth and free of yellow smoking tongues, indicating contamination of the outer surfaces of the nozzles and inlet openings of the burner sections.

In cases where gas and water leaks are detected, as well as burner malfunctions, it is necessary to repair and maintain the device.

8.4. Maintenance

8.4.1. During maintenance the following work is performed:

• cleaning and flushing the heat exchanger from scale inside the pipes and from soot outside;
• cleaning and washing water and gas filters;
• cleaning and flushing of the main and ignition burners;
• cleaning and lubricating the conical surface of the plug and the opening of the gas valve;
• cleaning and lubrication of seals and rods of water and gas blocks;
• checking the tightness of the gas and water systems of the device;
• checking the operation of the safety automation, including the draft sensor, for which it is necessary to remove the smoke exhaust pipe (see Fig. 1), turn on the device and, with the gas valve fully open and maximum water flow, close the device pipe metal sheet. After 10...60 seconds the device should turn off. After checking, install the chimney pipe according to Figure 5.

Works related to technical maintenance, are not warranty obligations of the manufacturer.

9. POSSIBLE MALFUNCTIONS OF THE NEVA 3208 APPARATUS AND METHODS OF THEIR ELIMINATION

10. STORAGE RULES

10.1. The device must be stored and transported only in the position indicated on the handling signs

10.2. The device must be stored indoors, ensuring protection from atmospheric and other harmful effects at air temperatures from -50°С to +40°С and relative humidity not exceeding 98%.

10.3. If the device is stored for more than 12 months, it must be preserved in accordance with GOST 9.014

10.4. The openings of the inlet and outlet pipes must be closed with plugs or plugs.

10.5. Every 6 months of storage the device must be subjected to technical inspection, in which the absence of moisture ingress and dust contamination of units and parts of the device is checked.

10.6. The devices should be stacked in no more than five tiers when stacked and transported.

11. CERTIFICATE OF ACCEPTANCE

Household instantaneous gas water heating device. NEVA - 3208 complies with GOST 19910-94 and is recognized as suitable for use

12. WARRANTY

The manufacturer guarantees trouble-free operation of the device if the design documentation for the installation of the device is available and if the consumer complies with the rules of storage, installation and operation established by this “Operation Manual”.

The warranty period for the device is 3 years from the date of sale through a retail network; 3 years from the date of receipt by the consumer (for off-market consumption);

12.3. Warranty repairs of the device are carried out by gas services, the manufacturer or other organizations licensed for this type of activity.

12.4. Average term The device service life is at least 12 years.

12.5. When purchasing a device, the buyer must receive an “Operation Manual” with the store’s mark of purchase and check that it contains tear-off coupons for warranty repairs.

12.6. If the warranty cards do not contain a store stamp indicating the date of sale of the device warranty period calculated from the date of its release by the manufacturer.

12.7. When repairing the device, the warranty card and its counterfoil are filled out by an employee of the gas industry or an organization licensed for this type of activity. The warranty card is confiscated by an employee of the gas industry or an organization licensed for this type of activity. The warranty card stub remains in the instruction manual.

12.8. The Manufacturer is not responsible for the malfunction of the device and does not guarantee its operation if the Consumer’s claim provides evidence of:

a) failure to comply with installation and operation rules;

b) failure to comply with the rules of transportation and storage by the Consumer, trading and transport organizations;

Evidence can be presented both in the form of an independent Expert’s conclusion, and in the form of an act drawn up by a representative of the Manufacturer and signed by the Consumer.

Review of the gas water heater Neva 4511 VPG-18

Household geyser Neva 4511, 4513 (water heater VPG-18) is designed to provide hot water apartments, country houses. This is a compact model with a digital display, reliable and easy to maintain, equipped with a full set of security systems.

Designation of the water heater VPG-18-223-V11-UHL 4.2, where:

B – water heating apparatus,
P – flow-through;
G – gas;
18 – nominal heating capacity, kW;
223 – the device runs on natural and liquefied gases;
B11 – removal of combustion products through the chimney;
UHL 4.2 – climatic version.

Advantages of the geyser Neva 4511, 4513

Designed to quickly heat water;

Operates at low water pressure (0.10 Bar)

Automatic electronic ignition;

Compact overall dimensions;

Compact 2-tier heat exchanger;

Water-cooled combustion chamber;

Modern security systems;

Built-in temperature indicator;

1-2 water points;

Technical characteristics of the gas water heater Neva 4511

General Settings

Rated thermal power, kW - 21

Productivity, l/min - 11

Gas pressure (natural/liquefied) - 1.3/2.9 kPa

Nominal gas consumption (natural/liquefied), m3/hour - 2.2/0.8

Minimum water pressure - 30 kPa

Maximum water pressure, kPa - 1000

Type of communication supply - Lower

Diameter of the supply pipe, mm - 19.17

Chimney diameter, mm - 122.6

Control functions of the water heater VPG-18

Control - Mechanical

Functions - Flame adjustment, Water flow adjustment, Auto-ignition

Indication - Display

Indicators - Temperature display

Operating Parameters

Nominal heating capacity - 18 kW.

Efficiency factor - no less than 84%.

Gas group - 2nd; N/3rd; B/P.

Mass flow rate of combustion products of natural / liquefied gas at rated thermal power - 7.4 / 8.0 g/s.

The type of ignition of the device is electronic.

Device dimensions, Dimensions (WxHxD), mm - 290 x 565 x 221 mm

Weight, kg - 10

The wall-type geyser Neva 4511, 4513 (see Fig. 1) has a rectangular shape formed by a removable lining 4.

On the front side of the cladding there are: water flow adjustment knob 1, gas flow adjustment knob 2, water temperature display 3 and viewing window 5 for monitoring the burner flame. All main elements are mounted on the rear wall 22 (see Fig. 2).

Figure 1. Appearance and dimensions of the geyser Neva 4511, 4513

1 – knob for adjusting water flow; 2 – gas flow adjustment knob; 3 – water temperature display; 4 – facing; 5 – viewing window; 6 – cold water supply fitting, G 1/2 thread; 7 – gas supply fitting, thread G 1/2; 8 – hot water outlet fitting, thread G 1/2; 9 – pipe of the gas exhaust device; 10 – mounting holes.

Figure 2. View of the gas water heater Neva 4511, 4513 without casing

1 – water flow regulator; 2 – gas flow regulator; 3 – plate; 4 – water-gas unit; 5 – burner; 6 – cold water supply fitting; 7 – gas supply fitting; 8 – hot water outlet fitting; 9 – gas exhaust device; 10 – candle; 11 – flame presence sensor; 12 – heat exchanger; 13 – valve
electromagnetic; 14 – battery compartment; 15 – electronic control unit; 16 – thermal relay (draft presence sensor); 17 – microswitch (water flow sensor); 18 – water temperature sensor; 19 – thermal relay (water overheating sensor); 20 – plug for draining water; 21 – fitting for measuring gas pressure; 22 – back wall; 23 – screws for fastening the cladding.

Purpose of main components and components geyser Neva 4511, 4513

Water-gas unit 4 is designed to control the gas supply to the burner, regulate water flow and consists of water and gas units (the design of the unit ensures gas access to the burner only if there is a water flow);

Burner 5 is designed to create and supply an air-gas mixture to the combustion site;

The gas exhaust device 9 is designed to remove combustion products into the chimney;

Spark plug 10 is designed to create a spark discharge to ignite the burner;

The flame presence sensor 11 provides control of the burner operation;

Heat exchanger 12 ensures the transfer of heat obtained from gas combustion to water flowing through its pipes;

Thermal relay 16 (draft presence sensor) is designed to turn off the device if there is no draft in the chimney;

Water temperature sensor 18 is designed to determine the water temperature at the outlet of the apparatus;

Thermal relay 19 (water overheating sensor) is designed to turn off the Neva 4511, 4513 geyser when the water is heated above 90°C;

Plug 20 serves to drain water from the water circuit of the device to prevent it from freezing; The safety valve built into the plug is designed to protect the water circuit of the water heater from increased water pressure.

The working diagram of the VPG-18 water heater is shown in Figure 3.

When water begins to flow through the water unit 22 (see Fig. 3) with a flow rate of at least 2.5 l/min, the membrane rod 25 opens the gas valve 30 and the contacts of the microswitch 17 close, after which the control unit 15 opens the electromagnetic valve 13 and begins to flow high voltage current pulses to spark plug 10.

Burner 5 is ignited by spark discharges between the spark plug electrode and the nozzle of the burner section. Next, the operation of the burner is monitored by flame presence sensor 11.

The water flow regulator 1 regulates the amount and water temperature, leaving the device: turning the regulator counterclockwise increases the flow rate and reduces the water temperature; turning the knob clockwise reduces the flow rate and increases the water temperature.

The position of the regulator also determines the water flow at which the device turns on.

Gas flow regulator 2 regulates the amount of gas entering the burner to obtain the required water temperature at its set flow rate: turning the regulator counterclockwise increases the gas flow and water temperature; turning the knob clockwise reduces gas flow and water temperature.

When water flow stops or its flow rate decreases to less than 2.5 l/min, the contacts of microswitch 17 open and valves 13 and 30 close. The burner goes out.

R Figure 3. Diagram of the gas water heater Neva 4511, 4513

1 – water flow regulator; 2 – gas flow regulator; 3 – water temperature display; 4 – water-gas unit; 5 – burner; 6 – cold water inlet; 7 – gas inlet; 8 – hot water outlet; 9 – gas exhaust device; 10 – candle; 11 – flame presence sensor; 12 – heat exchanger; 13 – electromagnetic valve; 14 – battery compartment; 15 – electronic control unit; 16 – thermal relay (traction sensor); 17 – microswitch; 18 – water temperature sensor; 19 – thermal relay (water overheating sensor); 20 – plug for draining water; 21 – fitting for measuring gas pressure; 22 – water unit; 23 – water purification filter; 24 – water flow limiter; 25 – membrane; 26 – Venturi fitting; 27 – water outlet to the heat exchanger; 28 – gas unit; 29 – gas purification filter; 30 – gas valve; 31 – gas outlet to the burner.

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These water heating devices(Table 133) (GOST 19910-74) are installed mainly in gasified residential buildings, equipped with running water, but without centralized hot water supply. They provide rapid (within 2 minutes) heating of water (up to a temperature of 45 ° C) continuously supplied from the water supply.
Based on the equipment with automatic and control devices, the devices are divided into two classes.

Table 133. TECHNICAL DATA OF DOMESTIC GAS FLOW WATER HEATING DEVICES

Note. Type 1 devices - with exhaust of combustion products into the chimney, type 2 - with exhaust of combustion products into the room.

High-end devices (B) have automatic safety and regulation devices that provide:

b) turning off the main burner in the absence of vacuum in
Chimney (apparatus type 1);
c) regulation of water flow;
d) regulation of gas flow or pressure (natural only).
All devices are equipped with an externally controlled ignition device, and type 2 devices are additionally equipped with a temperature selector.
First class devices (P) are equipped automatic devices ignition, providing:
a) gas access to the main burner only in the presence of a pilot flame and water flow;
b) turning off the main burner in the absence of vacuum in the Chimney (type 1 device).
The pressure of heated water at the inlet is 0.05-0.6 MPa (0.5-6 kgf/cm²).
The devices must have gas and water filters.
The devices are connected to water and gas pipelines using union nuts or couplings with lock nuts.
Symbol of a water heater with a rated heat load of 21 kW (18 thousand kcal/h) with combustion products discharged into the chimney, operating on gases of the 2nd category, first class: VPG-18-1-2 (GOST 19910-74).
Flowing gas water heaters KGI, GVA and L-3 are unified and have three models: VPG-8 (flowing gas water heater); HSV-18 and HSV-25 (Table 134).

Rice. 128. Flow gas water heater HSV-18
1 - cold water pipe; 2 - gas tap; 3 - pilot burner; 4-gas exhaust device; 5 - thermocouple; 6 - solenoid valve; 7 - gas pipeline; 8 - hot water pipe; 9 - traction sensor; 10 - heat exchanger; 11 - main burner; 12 - water-gas block with nozzle

Table 134. TECHNICAL DATA OF UNIFIED FLOW FLOW WATER HEATERS VPG

Table 135. TECHNICAL DATA OF GAS WATER HEATERS

The names of dispensers produced in Russia often contain the letters VPG: this is a water heating device (W), flow-through (P), gas (G). The number after the letters VPG indicates the thermal power of the device in kilowatts (kW). For example, VPG-23 is a flow-through gas water heating device with a thermal power of 23 kW. Thus, the name of modern speakers does not determine their design.

The VPG-23 water heater was created on the basis of the VPG-18 water heater, produced in Leningrad. Subsequently, VPG-23 was produced in the 90s at a number of enterprises in the USSR, and then - SIG. A number of such devices are in operation. Individual components, for example, the water part, are used in some models of modern Neva speakers.

Basic technical specifications HSV-23:

• thermal power - 23 kW;
• productivity when heated at 45 °C - 6 l/min;
• minimum water pressure - 0.5 bar:
• maximum water pressure - 6 bar.

VPG-23 consists of a gas outlet, a heat exchanger, a main burner, a block valve and a solenoid valve (Fig. 74).

The gas outlet serves to supply combustion products to the smoke exhaust pipe of the column. The heat exchanger consists of a heater and a fire chamber surrounded by a cold water coil. The height of the VPG-23 fire chamber is less than that of the KGI-56, because the VPG burner provides better mixing of gas with air, and the gas burns with a shorter flame. A significant number of HSV columns have a heat exchanger consisting of a single heater. The walls of the fire chamber in this case were made of steel sheet, there was no coil, which allowed saving copper. The main burner is multi-nozzle, it consists of 13 sections and a manifold, connected to each other by two screws. The sections are assembled into a single unit using coupling bolts. There are 13 nozzles installed in the manifold, each of which sprays gas into its own section.

The block tap consists of gas and water parts connected by three screws (Fig. 75). The gas part of the block valve consists of a body, a valve, a valve plug, and a gas valve cap. A conical insert for the gas valve plug is pressed into the housing. The valve has rubber seal by outer diameter. A cone spring presses on it from above. The safety valve seat is made in the form of a brass insert pressed into the gas part body. Gas tap has a handle with a limiter that fixes the opening of the gas supply to the igniter. The tap plug is pressed against the cone liner by a large spring.

The valve plug has a recess for supplying gas to the igniter. When the valve is turned from the extreme left position to an angle of 40°, the recess coincides with the gas supply hole, and gas begins to flow to the igniter. In order to supply gas to the main burner, the tap handle must be pressed and turned further.

The water part consists of the lower and upper covers, Venturi nozzle, membrane, poppet with rod, ignition retarder, rod seal and rod pressure bushing. Water is supplied to the water part on the left, enters the submembrane space, creating a pressure in it equal to the water pressure in the water supply. Having created pressure under the membrane, the water passes through the Venturi nozzle and rushes to the heat exchanger. The Venturi nozzle is a brass tube, in the narrowest part of which there are four through holes that open into an outer circular recess. The groove coincides with the through holes that are present in both water part covers. Through these holes, pressure from the narrowest part of the Venturi nozzle will be transferred to the supra-membrane space. The poppet rod is sealed with a nut, which compresses the fluoroplastic seal.

The water flow automation works as follows. When water passes through a Venturi nozzle, the narrowest part has the highest water speed and therefore the lowest pressure. This pressure is transmitted through through holes into the supra-membrane cavity of the water part. As a result, a pressure difference appears under and above the membrane, which bends upward and pushes the plate with the rod. The water part rod, resting against the gas part rod, lifts the valve from the seat. As a result, the gas passage to the main burner opens. When water flow stops, the pressure under and above the membrane is equalized. The cone spring presses on the valve and presses it against the seat, and the gas supply to the main burner stops.

The solenoid valve (Fig. 76) serves to shut off the gas supply when the igniter goes out.

When you press the solenoid valve button, its rod rests against the valve and moves it away from the seat, compressing the spring. At the same time, the armature is pressed against the core of the electromagnet. At the same time, gas begins to flow into the gas part of the block tap. After the igniter is ignited, the flame begins to heat the thermocouple, the end of which is installed in a strictly defined position in relation to the igniter (Fig. 77).

The voltage generated when the thermocouple is heated is supplied to the winding of the electromagnet core. In this case, the core holds the armature, and with it the valve, in the open position. The time during which the thermocouple generates the necessary thermo-EMF and the electromagnetic valve begins to hold the armature is about 60 seconds. When the igniter goes out, the thermocouple cools down and stops producing voltage. The core no longer holds the armature; under the action of the spring, the valve closes. The gas supply to both the igniter and the main burner is stopped.

Automatic draft switches off the gas supply to the main burner and igniter if the draft in the chimney is disrupted; it works on the principle of “gas removal from the igniter.” Automatic traction control consists of a tee, which is attached to the gas part of the block valve, a tube to the traction sensor and the sensor itself.

Gas from the tee is supplied to both the igniter and the draft sensor installed under the gas outlet. The traction sensor (Fig. 78) consists of a bimetallic plate and a fitting secured with two nuts. The upper nut also serves as a seat for a plug that blocks the gas outlet from the fitting. A tube supplying gas from the tee is attached to the fitting with a union nut.

With normal draft, combustion products go into the chimney without heating the bimetallic plate. The plug is pressed tightly to the seat, gas does not escape from the sensor. If the draft in the chimney is disrupted, the combustion products heat the bimetallic plate. It bends upward and opens the gas outlet from the fitting. The gas supply to the igniter decreases sharply, and the flame stops heating the thermocouple normally. It cools down and stops producing voltage. As a result, the solenoid valve closes.

Repair and maintenance

The main malfunctions of the VPG-23 column include:

1. The main burner does not light up:

• low water pressure;
• deformation or rupture of the membrane - replace the membrane;
• Venturi nozzle is clogged - clean the nozzle;
• the rod has come off the plate - replace the rod with the plate;
• misalignment of the gas part in relation to the water part - align with three screws;
• the rod does not move well in the oil seal - lubricate the rod and check the tightness of the nut. If you loosen the nut more than necessary, water may leak from under the seal.

2. When the water intake stops, the main burner does not go out:

• Contaminants have gotten under the safety valve - clean the seat and valve;
• the cone spring is weakened - replace the spring;
• the rod does not move well in the oil seal - lubricate the rod and check the tightness of the nut. When the pilot flame is present, the solenoid valve is not held open:

3. Violation of the electrical circuit between the thermocouple and the electromagnet (break or short circuit). The following reasons are possible:

• lack of contact between the thermocouple and electromagnet terminals - clean the terminals with sandpaper;
• insulation failure copper wire thermocouple and short circuit it with the tube - in this case the thermocouple is replaced;
• violation of the insulation of the turns of the electromagnet coil, shorting them to each other or to the core - in this case the valve is replaced;
• disruption of the magnetic circuit between the armature and the core of the electromagnet coil due to oxidation, dirt, grease film, etc. It is necessary to clean the surfaces using a piece of rough cloth. It is not allowed to clean surfaces with needle files, sandpaper etc.

4. Insufficient heating of the thermocouple:

• the working end of the thermocouple is smoked - remove soot from the hot junction of the thermocouple;
• the igniter nozzle is clogged - clean the nozzle;
• The thermocouple is incorrectly installed relative to the igniter - install the thermocouple relative to the igniter so as to ensure sufficient heating.